Intervals are inclusive of the start instant and exclusive of the end. An interval abuts if it starts immediately after, or ends immediately before this interval without overlap. A zero duration interval abuts with itself.
When two intervals are compared the result is one of three states: (a) they abut, (b) there is a gap between them, (c) they overlap. The abuts state takes precedence over the other two, thus a zero duration interval at the start of a larger interval abuts and does not overlap.
For example:
[09:00 to 10:00) abuts [08:00 to 08:30) = false (completely before) [09:00 to 10:00) abuts [08:00 to 09:00) = true [09:00 to 10:00) abuts [08:00 to 09:01) = false (overlaps) [09:00 to 10:00) abuts [09:00 to 09:00) = true [09:00 to 10:00) abuts [09:00 to 09:01) = false (overlaps) [09:00 to 10:00) abuts [10:00 to 10:00) = true [09:00 to 10:00) abuts [10:00 to 10:30) = true [09:00 to 10:00) abuts [10:30 to 11:00) = false (completely after) [14:00 to 14:00) abuts [14:00 to 14:00) = true [14:00 to 14:00) abuts [14:00 to 15:00) = true [14:00 to 14:00) abuts [13:00 to 14:00) = true@param interval the interval to examine, null means now @return true if the interval abuts @since 1.1
| |
| |